الفهرس 
IntroductiionOnly 14 pages are availabe for public view
 |  | from | 142 |  |  |
| | | from | 142 | | |
Abstract
The environment’s pollution problem has become one of the most important problems which faces our society nowadays. So all the efforts are directed to control this danger, specially it has a bad effect on man’s health which is considered a national wealth for any country.
The sources of this pollution are dust emission from cement and porcelain factories and dusts and fine fibres emitted from spinning mills. This thesis is concerned with the pollution from the conventional opening and cleaning lines where it has a direct effect first, on worker’s health, then on material quality, also on pollution of the outer air out of the mill. Consequently the control on this pollution is healthy and economical necessity.
These dusts and impurities are filtered in a room at the end of opening and cleaning line containing woven sacs ( filters ) through where the air which carries fine fibres and suspended impurities passes, then the fabric retains dust and impurities and the air comes out clean.
The fine fibres and impurities which are collected in filters was extracted the cotton fibres from it which are used in manufacturing medical cotton and cotton waste. Also the other trashes and dust are used by farmers as fertilizers.
Then it is clear that filtration process and filters are very important in this field also they have an economical importance if it is known that the fabrics which are used in spinning mill now are imported or local but the local have not the required specifications as the imported fabrics in conventional opening and cleaning lines.
So, the aim of this work is the development of some knitted fabric structures which are produced on the circular knitting machines to be suitable as filters in opening and cleaning lines. But it may be something new to hear that the knitted fabrics can be used as industrial fabrics, so the quick answer on this admiration is that the new technology now is the expansion in developing and using the knitted fabrics as industrial fabrics in several fields and replacing them with woven and non-woven fabrics because they have the following properties :
1-cheaper in cost and fastly in production.
2-They can be produced directly in the required shape flat or circular in different diameters and different densities because of numerous types of knitted machines which give the required shape directly without seaming.
It has been produced four different knitted structures each of which with two levels of fabric weight/unit area.